TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN
Online ISSN : 1884-0485
ISSN-L : 1884-0485
d) Astrodynamics, Navigation Guidance and Control
Decentralized Robust Optimal Control of Large Flexible Space Structures by Fourth Order Local Proper Controllers Using Displacement Output
Kengo IGAWAYohji KOBAYASHI
Author information
JOURNAL FREE ACCESS

2016 Volume 14 Issue ists30 Pages Pd_95-Pd_103

Details
Abstract

This paper considers position and attitude control of large flexible space structures composed of a number of subsystems(substructures) under the assumption of sensors and actuators collocation. The purpose of this paper is to propose a decentralized control scheme with fourth order local proper controllers using displacement/angle output, which makes both each closed-loop subsystem and an overall closed-loop system not only robustly stable but also optimal for quadratic cost functions. We first introduce a fourth order local proper controller for stabilizing each subsystem using only displacement/angle output. Then, we show each closed-loop subsystem becomes not only robustly stable against uncertain characteristic parameters such as mass, damping, and stiffness, but also optimal for a quadratic cost function by choosing parameters of each local proper controller appropriately. After stabilizing and optimizing each subsystem, we interconnect the closed-loop subsystems by flexible links to obtain an overall closed-loop system, and we show the overall closed-loop system also becomes robustly stable and optimal for a quadratic cost function. Finally, numerical examples are presented to show effectiveness of the proposed method.

Content from these authors
© 2016 The Japan Society for Aeronautical and Space Sciences
Previous article Next article
feedback
Top